The process of evolution [by] Paul R. Ehrlich [and] Richard W. Holm. Illustrated by Anne H. Ehrlich. Ehrlich, Paul R. Holm, Richard W., joint author. Evolution (Biology) Genetics. QH366 .E47 575 EHP Includes bibliographies. New York, McGraw-Hill [1963] [1963] 1963 Text xvi, 347 p. eng McGraw-Hill publications in the biological sciences. Series in population biology